Improvement in roasting- iron-ores by waste gases



A.HAMAB.

Roasting Ores. No. 84,113.` Patented Nov. 17, 1858.

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LEXANDER HAMAR, OF NEW YORK, .N. Y.

Lette/rs Patent No. 84,113, dated Noormtbe?` 17, 1868.

IMPROVEMENT IN ROASTING- IRON-CRES BY WASTE GASES.

To all lwhom it may concern:

Be it known that I, ALEXANDER Hanan, of New -York city, have invented a new and useful Improvement in Furnaces for Roasting Orcs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which make part of this specification, and in which- Figure 1 is a ground plan;

Figure 2, a side elevation; V

Figure 3, a vertical section, at the linea x of fig. 1; and

Figure 4, a similar section, at the line y y of g. 1.

The obj ect of my invention is to roast ores thoroughly and cheaply, by feeding them continuously through a kiln or furnace, to which ends my improvement'consist in a novel method, hereinafter described, of con structing an apparatus for roasting the ores by uti1iz ing the waste gases from a smelting-furnace.

A portion of the waste gases escaping from an ordinary blastd'urnace is collected in any of the well-known ways, and forced, by a fan or pump, into the due D. Under heavy pressure therein they escape through the slitsd into the roast-ingehamber, and percolate through the mass of raw ore contained therein, finally escaping at the top of the kiln. These gases being very highly heated, roast the ores thoroughly, without the use of other fuel, the economy of which arrangement must be obvious to every iron-master. The roasted ores fall through the opening b into a space below the chamber, and may be raked out, at proper intervals, 'through the doors F. As the ore in the chamber sinks, fresh charges are supplied, and the operation thus rendered continuous.

I have deemed it necessary herein to show only the details' of the roasting-kiln. Thelother devices described are so well known vas to require no detailed description here.'

vI' am aware that-waste gases'have been used to roast ores, in a manner different from that employed by me. I do not, therefore, under this application, broadly claim roasting ores by the waste gases escaping from a furnace; but having thus described the construct-ion and operation of my improved apparatus for roasting ores,

What I claim as my invention, and desire to secure by Letters Patent, is

The combination, as set forth, with the kiln, of the open top for charging the raw ore, the open bottom for discharging the roasted ores, the flue, encircling the roasting-chamber, and communicating. with it by the slits (I, and a fan, for forcing in theI heated Waste gases escaping from the blast-furnace.

In testimony whereof, I have hereunto subscribed 

